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x² + 9x - 36 = 0 Factorizas trinomio de la forma x² + bx + c
(x + 12)(x - 3) = 0 Tiene 2 raices reales
x + 12 = 0
x = -12
o
x - 3 = 0
x = 3
Solucion.
(- 12 , 3)